Local intraarterial thrombolysis: In vitro comparison between automatic and manual pulse-spray infusion

Jens J. Froelich, Christina Freymann, Martin Hoppe, Thomas Thiel, H. Joachim Wagner, Klemens H. Barth, Klaus J. Klose

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Purpose: Manual and automatic pulse-spray infusion techniques are compared in vitro to evaluate the efficacy of thrombolysis and the distribution of urokinase and saline solution within thrombus using a pulse- spray catheter. Methods: A pulse-spray catheter was introduced into a human thrombus within a stenotic flow model. Automatic and manual pulsed infusion of urokinase and automatic pulsed infusion of saline solution were compared. To quantify the efficacy of thrombolysis, pressure gradients were recorded proximal and distal to the thrombus and during the course of infusion. Distribution of infused urokinase was assessed radiographically. Results: The fastest and most homogeneous dissolution of the thrombus was achieved with automatic pulsed infusion of urokinase, shown by decreasing transthrombotic pressure gradients (p < 0.001, Wilcoxon, matched pairs). Manual pulsed infusion of urokinase or saline solution resulted in inhomogeneous thrombus dissolution and delayed thrombolysis. Conclusion: Application of automatic pulse-spray injectors seems beneficial for more effective and homogeneous intraarterial pulse-spray thrombolysis when compared with conventional manual pulsed technique.

Original languageEnglish (US)
Pages (from-to)423-427
Number of pages5
JournalCardiovascular and interventional radiology
Issue number6
StatePublished - Nov 1996


  • Catheters and catheterization
  • Flow model
  • Infusion technique
  • Thrombolysis
  • Thrombus
  • Urokinase

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine


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